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A guy by the name of antont posted this on DP in regards to these ebay items:

http://cgi.ebay.com/Sqoon-Test-Cart-Nintendo-Famicom-Japan-nes_W0QQitemZ280091910554QQcategoryZ4315QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

http://cgi.ebay.com/Gegege-no-Kitarou-Test-Cart-Nintendo-Famicom-Japan-nes_W0QQitemZ280091910048QQcategoryZ4315QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Quote:

Hello,
Those are not protos but recordable NES cartridges (made of EEPROMs) with pirated (copied) games on them. I have the copier and a few blank cartridges and they look exactly the same. The two holes are for the EEPROMs (that way they can be erased using UV light - when you turn a switch on the copier). The switch on the cartridge is used to toggle between two different video decoding modes - depending on the encoding used in the game you are copying.

Oh well, still cool nonetheless. :)

Ah, ok. I was hoping for better, but glad I didn't spend much on them. :) I'll be curious to see what I can do with them.

BTW: Would Nintendo have used something similar when testing games it was developing?

I have one one of those, it has a label that says EPROM 21 I think. It has the nintendo version of pinball on it. Why anyone would pirate this is anyone's guess. I wonder what mappers are supported or the size of the eproms it has. I still don't know a reliable way of opening fami carts without breaking them so I don't want to open it.

NES WORLD Forum
https://www.nesworld.com/cgi-bin/yabb/YaBB.pl General Video Gaming >> Your Game Finds >> Famicom Protos/Test Carts? https://www.nesworld.com/cgi-bin/yabb/YaBB.pl?num=1174154265 Message started by JC on 17. Mar 2007 at 18:57